AP Racing Catalogue Issue 4

80 visit www.apracing.com for installation drawings & up to date product range details HAND BRAKES INSTALLATION DRAWING GENERAL INFORMATION ◘ Double ended hand brake Master Cylinder. ◘ For use with dual circuits where diagonal brake split is mandatory. ◘ Forged Aluminium alloy body. ◘ Lightweight compact design. ◘ Hard anodised. ◘ High efficiency push type design. ◘ Mounted using rod end spherical bearings. ◘ One piece piston & push rod. ◘ Rubber boots fitted as standard. ◘ Alternative bore sizes available, please contact AP Racing Technical Department for more information. TECHNICAL DETAILS Weight 0.25kg (0.55lbs) Full Stroke 2 x 12mm Bore Dia. 0.70” (17.8mm) Travel To Cut-Off - Short 0.69 to 1.09mm (.027” to .043”) Hydraulic Thread - Outlet M10 x 1.0 - Inlet M10 x 1.0 T ypical Application Dual Circuit hand brake systems. CP6026-91 SPARES LIST REF: DESCRIPTION PART No. QTY /CYL 1 Rod End CP6026-101 2 2 M6 Nut ME21001 2 ADDITIONAL SPARE PARTS Seal Repair Kit (2 off each part) bolts, seals, piston washers & circlips. CP6025-91RK CP6026-91, Hand Brake Cylinder 22.00 12.00 MIN STROKE EACH END 25.9 Ø6.00 5.00° 8.06 8.06 5.00° 29.6 221.00 ±6.0 78.00 53.00 Ø32.0 MAX 1 2 OUTLET PORTS INLET PORTS 9.00 CP4780, Hand Brakes . GENERAL INFORMATION ◘ Lightweight fabricated base and lever assembly ◘ Ratchet locking & fly off mechanism incorporated. ◘ Lever ratio 7:1 ◘ Mounted using spherical bearing. ◘ Three options available, single circuit, dual circuit, and single circuit with differential release APPLICATION ◘ General Rally use. PART NUMBERS AND USAGE GUIDANCE. Hand Brake Assy Part Numbers Hand Brake Single Circuit Hand Brake Dual Circuit Hand Brake Single circuit & Differential Release Master Cylinder Families to be used: CP4780-1 • CP7855 Family (See Page 65) CP4780-3 • CP6026-91 CP4780-4 • CP5540 Family (See Page 68) 19.00 CIRCUIT SCHEMATIC CALIPERS FOOTBRAKE MASTER CYLINDER HANDBRAKE MASTER CYLINDER COMMON RESERVOIR SHUTTLE VALVE F C H 35.00 18.00 19.50 50.00 10.0 MIN FULL THR’D ALL PORTS M10 x 1.0 2 HOLES Ø6.30 BODY MATERIAL: ALUMINIUM ALLOY MASS: 55g INSTALLATION DRAWINGS CP4780-1 CP4780-3 CP4780-4 7:1 RATIO 275 245 CP6026 CYLINDER NOT INCLUDED LEVER POSITION AT 2/3 STROKE 42 255 127.50 Ø8.50 14 14.17° 525 75 Ø25 NOTE: ROD END TO BE REMOVED FROM CYLINDER AND REPLACED WITH COUPLING COUPLING TO BE THREADED UPTO SHOULDER HAND BRAKE LOCKING RATCHET 250 Ø8.50 18 127.50 25.85° Ø25 LEVER POSITION FULLSTROKE ON SMALLBORE (DIFF). HALF STROKE ON LARGE BORE (BRAKES Cp5540 CYLINDER NOT INCLUDED 525 75 240 270 45 HAND BRAKE LOCKING RATCHET NOTE: ROD END TO BE REMOVED FROM CYLINDER AND REPLACED WITH COUPLING COUPLING TO BE THREADED UPTO SHOULDER 7:1 RATIO Ø8.50 14 75 525 196 226 42 Cp7855 CYLINDER NOT INCLUDED LEVER POSITION AT 2/3 STROKE Ø25 HANDBRAKE LOCKING RATCHET 206 Note: Drawing for guidance only. Download latest issue installation drawing from www.apracing.com The AP Racing shuttle valve is a means of feeding two input hydraulic systems into one output. The output pressure will be as the largest input. A typical usage to separate a hydraulic hand brake from the foot brake system is illustrated below. IMPORTANT: Foot brake and hand brake master cylinders must be fed from a com- mon reservoir as indicated. When brake is operated from one source, this valve will decay at a rate of about 6bars over 10 minutes. As such, it should not be used to park the car for long periods, unattended. CP5088-1 SHUTTLE VALVE